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1. Diketahui :, Volume = 18cm\xb3, Panjang = 15cm, Lebar = 6cm, : Volume\xf7(PxL), 1800\xf7(15×6), 1800\xf790, t = 20cm, Ditanya = Lp balok?, Jawab, Luas permukaan balok = 2(pl+pt+lt), 2((15×6)+(15×20)+(5×20)), 2(90+300+100), 2(490), feff2.Diketahui :, panjang : 150cm = 1.5m, lebar : 75cm = 0.75m, tinggi : 80cm = 0.80m, feff=p.l.t, 1.5mx0,75mx0.80m = 0.9m\xb3, Debit = 12liter/menit =0.2liter/detik, Ditanya : waktu?, Jawab, Debit = Volume/wakt, waktu=volume/debit, =0.9×0.2, =0.18sekon ,